Great paper, Martin and I hope many appreciate the wisdom in it.

Maybe it's helpful to draw a line in the sand to illustrate a threshold of wealth that makes it crystal clear to everyone what a sufficient, happy and wealthy lifestyle is, beyond which greed comes into the equation. You did that well and explained it's of course affected by how many of us are doing it, but I'd like to make it even more explicit: It's okay to do what you must (ethically) to acquire a debt-free, appropriately sized home and have some left over but then STOP! We know that beyond about AU$70,000 / year more wealth doesn't contribute to happiness.

The question then becomes, what to do about going into excess? Reduce your activity and consumption; your economy and involvement in the monetary system.

I think when there's a wider understanding that no, the sky's not the limit when it comes to wealth, there may be the political will to change all the policies and systems that reward greed. There also needs to be a culture that achieves the big things that e.g. Elon Musk does, through collective action by governments or businesses without any one person dominating them. That requires social skills many currently haven't developed.